纳米纤丝纤维素复合材料制备OLED基材的研究

发布时间：2018-05-11 07:44

本文选题：纳米纤丝纤维素 + OLED基材　；参考：《广西大学》2017年硕士论文

【摘要】：纳米纤丝纤维素(NFC)具有好长宽比、高强度、低密度、可生物降解和可再生等特性,对NFC进行开发和研究,可拓宽造纸业中漂白浆的用途。基材是OLED设备中的第一层,是构建柔性电子器件非常重要的部分。本研究以漂白针叶木浆为原料,研究改性的NFC与丙烯酸树脂ABPE进行复合制备NFC/ABPE纳米复合材料,探讨该复合材料制备高性能的OLED基材的可行性。主要结论如下:(1)化学纯化使得纸浆中纤维素含量提高至96.90%。与单独的机械研磨处理相比,在机械研磨之后进行的高压均质处理对NFC的结晶度影响不大,NFC的热稳定性也比漂白浆稍高,同时得到的NFC直径更小、长宽比更大和得率更高。(2)不同的NFC:AC比例改性对NFC中的羟基取代影响较大,当NFC:AC比例大于1:6后,葡萄糖单元上的C3、C2和C6上的羟基均被乙酰基取代,且乙酰化的NFC无法形成膜。改性对NFC的热降解过程、Tmax、失重残余量和透光性影响不大,但改性对NFC膜的CTE、力学性能和柔韧性影响非常大,当NFC:AC比例为1:3时,能较好地保持NFC的力学性能、柔韧性、结晶度和降低其热稳定性。(3)NFC与ABPE复合制得的NFC/ABPE复合膜表面平整度增加,NFC与ABPE相容粘合性良好,且复合膜的透光性良好。不同的NFC用量对复合膜的热膨胀性、力学性能和柔韧性的影响最大,且复合膜的CTE较低均符合国家OLED基板的标准。当NFC用量为0.3 g或0.4 g时,复合膜的力学性能和柔韧性最优,与其他基材相比,所制得的复合膜作为生产OLED基材具有更高的性能。
[Abstract]:Nano-fiber cellulose (NFC) has the characteristics of good aspect ratio, high strength, low density, biodegradability and regeneration. The development and research of NFC can broaden the use of bleached pulp in paper industry. Substrate is the first layer of OLED equipment, and it is very important to construct flexible electronic devices. In this study, the modified NFC and acrylic resin ABPE were used as raw materials to prepare NFC/ABPE nanocomposites, and the feasibility of preparing high performance OLED substrates was discussed. The main conclusions are as follows: (1) Chemical purification increased cellulose content to 96.90%. Compared with the single mechanical grinding treatment, the high pressure homogenization treatment after mechanical grinding has little effect on the crystallinity of NFC and slightly higher thermal stability than that of bleached pulp, and the diameter of NFC is smaller than that of bleached pulp. When the ratio of NFC:AC is more than 1:6, the hydroxyl groups of C _ 3C _ 2 and C _ 6 on glucose unit are replaced by acetyl groups, and the acetylated NFC can not form membrane. The modification had little effect on the thermal degradation process of NFC, weight loss residual amount and light transmittance, but the modification had a great effect on the mechanical properties and flexibility of NFC film. When the NFC:AC ratio was 1:3, the mechanical properties and flexibility of NFC could be better maintained. The surface smoothness of the NFC/ABPE composite film prepared by decreasing its thermal stability. The thermal stability of the NFC/ABPE composite film increased the compatibility and adhesion of NFC/ABPE and ABPE, and the transmittance of the composite film was good. The influence of NFC content on thermal expansion, mechanical properties and flexibility of the composite membrane is the greatest, and the lower CTE of the composite membrane accords with the national standard of OLED substrate. When the amount of NFC is 0.3 g or 0.4 g, the mechanical properties and flexibility of the composite film are the best. Compared with other substrates, the composite film has higher properties as the OLED substrate.
【学位授予单位】：广西大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN383.1;TB33

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